Guidster, I posted on this a while back. Probably back in Sept. I found that it made no difference and I could never get my bike to run half as good after doing. (I'm sure you can but I just got tired of fooling with it.) Also, for all those contemplating this if your bike is already running good, here's the text of the email I received from Brian himself. KFROSTY, Hi there. I have been reading your posts on thumper talk and am sorry to hear you didn't have good luck with the carb mod I posted. I just wanted you to know that the modificaton isn't needed for an 02 426 because they carburate well already. The only reason I would do this to a new bike is to add adjustability to the carb. After all thats all it ever was intended to do in the first place. There has been an overwelming response to my original post but it was not intended to be a cure for all ills. I am happy to hear you bike rips in it's stock form and by all means if it ain't broke don't fix it! But if you just simply remove the adjusting screw the carb wil be back to stock.